My problem is that TRON is too fast to let anyone go near his disc or attach a disc on him. CLU would have to be twice as fast to pull it off, BUT we don't see the disc on his back. I think Tron got 'infected' by one of the guard's discs by way of disc to disc transference.

In other words, the guards were specifically designed to 'infect' Tron by using their discs and if his discs touch them by parrying their weapons, then that's the infection point there. The point was not to 'infect' Tron but to disable his weapons so he can't fend for himself.

http://img.photobucket.com/albums/v137/coastal_artist/TronFightlarge.gifTron starts out on his right side, head facing the camera as Clu stands over him. You can see the circuitry on his hip and shoulder at first. Then, as Clu raises Tron's disc over his head (trying to smash Tron with his own disc is just adding insult to injury), Tron starts twisting up towards Clu. If you look down at Clu's feet, you can see the circuitry on Tron's hand, and it moves up at the same time his head raises to block his shoulder circuits. He's trying to roll upwards or over onto his back and block the disc smash with his hand/arm, but it doesn't look like he's quick enough for a full block -- hence the shoulder injury in the end of Betrayal. It's the same shoulder, the left one, so I don't think the choreography is coincidence.

Then as Clu lands the hit, we cut back to Kevin and never see how the fight actually ends. Given that we see basics running around with half their face missing, I'm super-skeptical that a shoulder/arm injury would be enough to finish off Tron in a fight. From that position, with Clu bending over him post-smash, Clu would be vulnerable and it wouldn't be impossible for Tron to pull him to the ground and buy himself time to run away.abortion pills online abortion pill online purchase cytotec abortion